1. Expressed as a percentage to one decimal place (e.g., 12.3%), what is the app

Question

1. Expressed as a percentage to one decimal place (e.g., 12.3%), what is the approximate area under the Normal Probability Distribution curve between its two inflection points? If this cannot be determined based on the information given, then type in CBD.

2. Expressed as a percentage to one decimal place (e.g., 12.3%), Pr( - < x < + ) = ? If this cannot be determined based on the information given, then type in CBD.

3. Expressed as a percentage to one decimal place (e.g., 12.3%), Pr( - 2 < x < + 2) = ? If this cannot be determined based on the information given, then type in CBD.

4. Expressed as a percentage to one decimal place (e.g., 12.3%), Pr( - 3 < x < + 3) = ? If this cannot be determined based on the information given, then type in CBD

5. The quality standard known as “6” is based on there being only 3 ppm defects; that is, only 3 defects per million opportunities. To within how many standard deviations of the mean is 3 ppm? Just type in an integer value.

Explanation / Answer

1) approximate area under the Normal Probability Distribution curve between its two inflection points

=P(-1<Z<1)=68.3%

2)

Pr( - < x < + ) = 68.3%

3) Pr( - 2 < x < + 2) =95.4%

4) Pr( - 3 < x < + 3) = 99.7%

5)

6 standard deviaiton

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